Panasonic AG-MD830E User manual

ORDER NO, VSD9408M637
erviceManual
Panasonic SIVI-IS! ~~~ [}(]oo[po
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Operating Instructions
Disassembly Procedures
Mechanism
Electrical Adjustments
Block Diagrams
Schematic Diagrams
Circuit Board Diagrams
Exploded Views &
Replacement Parts Lists
SPECIFICATIONS
ITEM SPECIFICATION
Power
Source
AC 120V ~240V± 10%, 50-60Hz
Consumption Approx. 35Watts
Television CCIR Standard(625 lines, 50fields) PAL color signal
Format
Tape Speed
23.39mm/ s
Tape
Forma S-VHS, VHS
FF/REW
Approx. 2.5min. (with 180min. tape)
Time
Operating Temperature
5'C-40'C (41'F to 104'F)
Condition Humidity
35%-80%
Weight 7.0kg 4 heads (NOR (49t.t m) x
2, SS (35t.t m) x 2)
Heads 1 flying
(rotary) erase head (97 t.t m)
Luminance FM azimuth recording
Color signal Converted subcarrier phase shift recording
LINE (BNC); l.OVp-p,
750 unbalanced
Input S-VIDEO
(4P);
Y: l.OVp-p, 750 unbalanced
C: 0.3Vp-p (burst), 750 unbalanced
Video LINE (BNC); l.OVp-p,
750 unbalanced
Output S-VIDEO
(4P);
Y: 1.0Vp-p, 750 unbalanced
C: 0.3Vp-p (burst), 750 unbalanced
Signal-to- VHS; Color; 46dB
Noise
Ratio
B/W; 47dB
Horizontal
S- VHS; 400 lines
Resolution VHS; 240 lines
Panasonic
ITEM
Audio
Dimensions
Standard
Accessories
Optional
Accessories
625
Video Cassette Recorder
AG-MD830E
SPECI FICATION
Normal Audio Control; 1 stationary head 2 ch
Heads Hi-Fi Audio; 2
rotary head
Erase; 1 full track erase, 1 Audio track erase
Normal audio; 2 track (stereo)
Tracks Hi-Fi Audio; 2 channels (stereo)
LINE (PHONO) x
2; -8dB,47kO unbalanced
Input MIC (3.5mm PHONE);
-50dBv, 4.7kO unbalanced
LINE (PHONO) x
2; -8dB, 600 0 unbalanced
HEADPHONES (PHONE)
Output
-60dBv to -20dBv, 80 unbalanced
MONITOR(PHONO) -8dBv ,6000 unbalanced
Frequency Normal; 50Hz to 10kHz
Response Hi-Fi; 20Hz to 20kHz
Dynamic Hi-Fi; more than
90 dB
Range
Signal-to- Normal; better than 42dB
Noise Ratio
10 - 5/8"
(W) x 5 - 3/16" CH) x 14 - 3/8" CD)
270 (W) x 13l.5 (H) x 365.5 CD) mm
Power Cable
RS-232C Serial Interface ..........................·AG-IA823
34-pin Interface ·······································AG-IA34
Remote Controller ....·..............·................AG-A600
Pause Remote Controller" ..................·······VW-RM1
Weight and dimensions shown are approximate.
Specifications
are subject to change without notice.

INTRODUCTION
This Service Manual contains all the technical information which will allow service personnel
to understand and service the Panasonic S-VHS video cassette recorder model AG-MD 83 DE.
This model is developed for applications in industry and medical establishments and in
addition, it has an optional accessory RS-232C Interface is a capable of satellite
communication.
By the
use of S-VHS system, a sharp picture quality with high resolution is obtained, and
advanced editing
by easy operation is realized by the introduction of highly dependable
mechanisms.
Just slightly ahead
of our time ... Panasonic
CONTENTS
SPECIFICATIONS ...................................................... ·····················Cover
SAFETYPRECAUTIONS···································································· ·2
SERVICE INFORMATION ............................................................. ·····3
SECTION 1 OPERATING INSTRUCTIONS ··········································1-1
SECTION 2 DISASSEMBLY PROCEDURES ......................................... ·2-1
SECTION 3 MECHANISM ................................................................. ·3-1
SECTION 4 ELECTRICAL ADJUSTMENTS ··········································4-1
SECTION 5 BLOCK DIAGRAMS ...................................................... ···BLK-1
SECTION 6 SCHEMATIC DIAGRAMS
················································SCM-1
SECTION 7 CIRCUIT BOARD DIAGRAMS ......................................... ·CBA-1
SECTION 8 EXPLODED VIEWS & REPLACEMENT PARTS LISTS ············PRT-1
-1-

SAFETY PRECAUTIONS
GENERAL GUIDELINES
1. When servicing observe the original lead dress. If a short
circuit isfound, replac all parts which have been overheated
or damaged by the short circuit.
2. After servici ng, see to it that aII the protectiv devices such as
insulation barriers, insulation papers shields are properly
installed.
3. After servicing make the following leakage current checks
to prevent the customer from bei ng exposed to shock
hazards.
LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the two
prongs onthe plug.
2. Measur the resistance value, with an ohm meter, between
the
jumpered AC plug and each exposed metallic cabinet
part on the equipment such as screwhead connectors, contrl
shafts, etc. When the exposed metallic part has a return
path to the chassis, the reading shoulb be between 1M Q
and 5.2MQ.
When the exposed metal dose not have a return path to the
chassis, the reading m ust be 00 .
AC VOLTMETER
Hot-Check Circuit
TO
APPLIANCE'S
EXPOSED
METAL PARTS
0.15,u F
Figure 1
COLD
WATER PIPE
(EARTH GROUND)
LEAKAGE CURRENT HOT CHECK (See Figure 1)
1. Plug the AC cord directly into the AC outlet.
Do not use an isolation transformer for this check.
2. Connect a 1.5KQ, 10W resistor, inparallel with 0.15,u F
capacitor, between each exposed metallic part on the set an
a
good earth grou'nd such as a water pipe, as shown in
Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more
sensitivity, to measur the potential across the resistor.
4. Check each exposed metallic part, and measure the voltage
at each poi nt.
5. Reverse the AC plug in the AC outlet repeat each of the
above measurements.
6. The potantial at any point should not exceed 0.75 volts
RMS. A leakage current tester (Simpson Model 229
equivalent) may be used to make the hot checks, leakage
current must not exceed 1/2 milliamp. In case a
measurement is outside of the limits specified, there is a
possiblity of a shock hazard, and the equipment should be
repa ired and rechecked before it is returned to the
customer.
ELECTROSTATICALLY SENSITIVE( ES) DEVICES
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically sensitive (ES) Devices. Examples of
typical ES devices are integrated circuits and some field-effect
transistors and semiconductor "chip" components. The
following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor
component or semiconductor-equipped assembly, drain off
any electrostatic charge on your body by touching a known
earth ground.
Alternatively, obtain and wear a commercially available
discharging wrist strap device, which should be removed
for potential shock reasons prior to applying power to the
unit under test.
2.
After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded tip soldering iron to solder or
unsolder ES devices.
4. Use only an anti-static solder removal device classified as
"anti-static" can generate electrical charges sufficient to
damage ES devices.
5.
Do not use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package untilimmediately before you are ready to install
it. (most replacement ES devices are packaged with leads
electrically shorted together by conductive foam,
aluminum foil or comparable conductive material).
7. Immediately before removing the protective material from
the leads of replacement ES device, touch the protective
material to the chassis or circuit assembly into which the
device
will be installed.
CAUTION: Be sure no power is applied to the chassis or
circuit, and observe all otner asfety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devoces. (Otherwise harm less mother such
as the
brushing together of your clothes fabric or the lifting
of your foor from a carpeted floor can generate static
electricity sufficient to damage an ES device).
-2-

SERVICE INFORMATION
1. EXTENDERS
1. EXTENDER BOARD 50P (VFK0945) MJiWl
FOR AUDIO (1 ), VIDEO (1 ), (2) and (3) P.C. BOARDs
2. EXTENDER CODE 8P (VFK0828) SAME AS AG-6730 etc.
FOR POWER SUPPLY UNIT
EXTENDER BOARD 50P
(VFK0945)
VI DEO
(2) C. B.A.
VIDEO (3) C.B.A.
-3-

2. CIRCUIT BOARD LAYOUT
POWER SUPPLY (1) C.BA POWER SUPPLY (3) C.BA
REF. No. 1100 SERIES REF. No. 1000 SERIES
POWER SUPPLY
(2) C.BA
REF. No. 1000 SERIES
AUDIO (1) C.BA
VIDEO (1) C. BA
REF. No. 8000 SERIES
~Jt---_ VIDEO (2) C.BA
HEAD AMP C.BA ~
REF. No. 5000 SERIES , • ./"1
I .......... :./1J .. ~ .....
~ .. ~r'" I ........... "
, • ........ ; ... ', .... 1 .... I .... 1
FRONT (1) ~ (4) C.BA
REF. No. 6700 SERIES
1""'--: I -..I............ I
V"..... I -< '
........ I .......... '1
r:..... I
I ....... .....J....... ........ I
I ......... <; ............ "'"-."," I
I ..... - ... I
I .........~ J
... ... ..
l.. y .........
..... I ....
... I ..
... I ...... r
1'..... I ........
• .........&.. ..
L.............,
REEL DRIVE C.BA
REF. No. 2700 SERIES j
SERVO & SYSTEM CONTROL C.BA
SYSTEM CONTROL & SERVO C.B.A. AUDIO (1) C.B.A.
REF. No. 8000 SERIES
VIDEO
(3) C.BA
REF. No. 8000 SERIES
REAR JACK C.BA
REF. No. 6900 SERIES
MOTHER C.BA
REF. No. 900 SERIES
SYSTEM CONTROL SECTION: REF NO. 6000 SERIES
SERVO SECTION: REF. No. 2000 SERIES
NORMAL AUDIO SECTION: REF. No. 4000 SERIES
Hi-Fi AUDIO SECTION: REF. No. 4000 SERIES
CTL AMP SECTION: REF. No. 2300 SERIES
REEL SERVO SECTION: REF. No. 2500 SERIES
MOTER DRIVE SECTION: REF. No. 2300 SERIES
DC-DC CONVERTOR SECTION: REF. No. 2900 SERIES
-4-

3. INITIALIZE (HOUR METER, MENU SETTINGS)
1. Turn off the Power.
2. Connect a jumper wire between TP8006 on the VIDEO (3) C.B.A. and TP1 on the VIDEO (1) C.B.A.
3. Set the MODE LOCK switch to ON.
ONn
OFFLJ t
WOOf lOCl
<< HOUR METER RESET> >
Turn
on the Power while the PLAY, REC and PAUSE buttons are depressed.
PLAY
nEe PAUSE/STIlL
GJ
[!][E] OFF
lb:;~=~ ON
-PAGE
PAGE + POWER
< < MENU SETTINGS RESET> >
Turn
on the Power whi le the REW, STOP and FF buttons are depressed.
nEW
STOP FF
EJJ
[!]EJJ
OFF~~=~
-DATA DATA I· SHIFT V
-5-

4. DIMENSIONS
D
nn
@
\
It
SVIISI
270 (10-5/8" )
~
~
{
11 ""'@J
,-r-
,
,
Cl
Cl
~
,
<0
r--..
0
~
'-"
LO
.n
<0
N
'-'-
-6-
I~
131.5 (5-3/16" )
j'fi
~ h
~ ~
p
.--...
,
<Xl
'"
(Y')
I
~
~
'-"
LO
cri
<Xl
N
~
fr;
~
~
IV
~
\ f
.--...
UNIT: mm (inch)
,
LO
LO
<0
(Y')

OPERATING
INSTRUCTIONS
CONTENTS
Caution for AC Mains Lead ..........................................................................1-2
Features.......................................................................................................1-2
Controls........................................................................................................1-3
Front Panel ................................................................................................................................ 1-3
Rear Panel ................................................................................................................................ 1-3
Menu Screens ..............................................................................................1-4
Menu Item Settings ................................................................................................................... 1-4
Counter Section ...........................................................................................1-5
Memory Stop ............................................................................................................................. 1-5
Counter Reset ........................................................................................................................... 1-5
Remaining Tape ........................................................................................................................ 1-5
VISS Signal ............................................................................................................................... 1-6
Repeat Playback ....................................................................................................................... 1-6
Recording .....................................................................................................1-7
Preparations .............................................................................................................................. 1-7
Recording .................................................................................................................................. 1-7
Audio Monitoring........................................................................................................................ 1-7
Playback ......................................................................................................1-7
Preparations .............................................................................................................................. 1-7
Playback .................................................................................................................................... 1-7
Rewinding and Fast Forwarding ................................................................................................ 1-8
Search/Jog Playback ................................................................................................................. 1-8
To Finish Playback .................................................................................................................... 1-8
Still Playback and Slow-Motion Playback .................................................................................. 1-8
Field-by-Field Playback ............................................................................................................. 1-8
Unrecorded Blank Search ......................................................................................................... 1-8
Audio Dubbing .............................................................................................1-8
1 -1
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......
Caution for AC Mains Lead
FOR YOUR SAFETY PLEASE READ THE FOLLOWING TEXT CAREFULLY.
This product is equipped wijh 2 types of AC mains cable. One is for continental Europe, etc. and the other one is only for
U.K.
Appropriate mains cable must be used in each local area, since the other type of mains cable is not suitable.
FOR CONTINENTAL EUROPE, ETC.
Not to be used in the U.K.
FOR U.K. ONLY
This appliance is supplied with a moulded three pin
mains plug for your safety and convenience.
A 13 amp fuse is fined in this plug.
Should the fuse need to be replaced please ensure that
the replacement fuse has a rating of 13 amps and that
it is approved by ASTA or BSI to BS1362.
Check for the ASTA mark ~ or the BSI mark ~ on the
body of the fuse.
If the plug contains a removable fuse cover you must
ensure that
it is refitted when the fuse is replaced.
If you lose the fuse cover the plug must not be used
until a replacement cover is obtained.
A replacement fuse cover can be purchased from your
local Panasonic Dealer.
IF THE FITTED MOULDED PLUG IS UNSUITABLE
FOR THE SOCKET OUTLET IN YOUR HOME THEN
THE FUSE SHOULD BE REMOVED AND THE PLUG
CUT OFF AND DISPOSED OF SAFELY. THERE IS A
DANGER OF SEVERE ELECTRICAL SHOCK IF THE
CUT OFF PLUG IS INSERTED INTO ANY 13 AMP
SOCKET.
If a new plug is to be fitted please observe the wiring
code as shown below.
If in any doubt please consult a qualified electrician.
WARNING:
THIS APPLIANCE MUST BE EARTHED.
IMPORTANT: The wires in Ihis mains lead are coloured
in accordance with the following code:
Green·and·Yellow: Earth
Blue: Neutral
Brown:
Live
FOR U.K. ONLY
If the plug supplied is not suitable for your socket
out/et,
it should be cut off and appropriate one fitted.
As the colours of the wires in the mains lead of this
appliance may not correspond with the coloured mark-
ings identifying the terminals in your plug, proceed as
follows:
• The wire which is coloured GREEN·AND-YELLOW
must be connected to the terminal in the plug which is
marked with the letter E or by the Earth symbol ~ or
coloured
GREEN or GREEN-AND·YELLOW.
•
The wire which is coloured BLUE must be connected
to the terminal in the plug which is marked with the
letter Nor coloured BLACK.
• The wire which is coloured BROWN must be con-
nected to the terminal
in the plug which is marked with
the letter L or coloured RED.
How to replace the fuse
1. Open the fuse compartment with a screwdriver.
2. Replace the fuse.
- E-2-
OPERATING INSTRUCTIONS
Features
Rotary erase head
The rotary erase head is featured to ensure cleaner
edits during editing.
Hi-Fi
recording
High picture quality
Compactly designed for easy portability
Illuminated operation buttons
Repeat playback
A particular section on the tape can be continuously
played back repeatedly
or played back once.
Jog and shuttle functions
The unit's jog and shuttle functions enable playback
section to be located speedily using the search dial.
Mode locking
Even when an operation button has been pressed in
error, the mode lock function prevents the unit from
performing the operation corresponding to that button.
Unrecorded blank search
The unit detects unrecorded blanks which are 5. or
more seconds in length.
Automatic high-speed VISS search
By writing the VISS (VHS Index Search System)
signals
at particular scenes to be viewed, the scenes
can be easily located and played back automatically.
Audio dubbing
Audio can be added to the normal audio track during
post production editing.
Switch settings on screen menus
The unit's on-screen system enables switch settings to
be viewed on Ihe TV screen.
Auto head cleaning
This facility automatically cleans the video heads to
remove
any dirt.
Pause remote control supported
Recording can be started and stopped by remote
control using the VW-RM1 which is available as an
optional accessory.
RS-232C serial interface supported
The unit can be remote-controlled from a personal
computer by mounting the AG-IA823 interface which
is available as an optional accessory.
34-pin remote control supported
The unit can be operated from a distance of 5
meters or so using the AG·A600 (an optional acces·
sory) by installing the AG·IA34 interface which is
available as an optional accessory.
-E-5 -

Controls
Front Panel Rear Panel
(5)
(4)
(15)(20) (13)(14)
®
@
(11 )--++--+--"'8:88:88.
---f.lll-lf- (3)
(10)
o
(1 ) (9)
(8)
(7)
(6) (2) (12)
(21 ) (18) (19)(17)(16) (22) (23)
~Nl0.
I
--
Name Page No. Name Page
---- --- --
--_.-
.. _-------
_._._---------
Power switch
-8 Microphone jack (mini jack) E-14
t---
- ------
Operation buttons 9 Hi-Fi audio level control CH1/CH2 E-14
STOP, PLAY, REC, REW, FF,
-------- ------------ -------
f-----
2 PAUSE/STILL, AUDIO DUB,
E·ll-
10 Counter setting buttons
E'll
BLANK SEARCH E·17
11 Counter/audio level meter
E·ll
-- -- ----- --
1----------
3 Search dial E-16 Setting switch section
-4 Eject button/tape indicator -AUDIO
OUT selector E·15
5 Cassette holder -METER/AUDIO OUT switch (Hi·FilNORMAL) E'14
-
6 Tracking buttons E·16 12 VIDEO INPUT selector (S·VIDEO/UNE) E·14
S·VHS REC MODE selector (AUTO/OFF) E·14
7 Headphones jack (mini jack)/ E·14 MENU screen selector (SET/OFF) E·8
Headphone level control -
----- .. _----------
1--
No.
Name
Page No.
Name
Page
13 VIDEO inputconnector (BNC) E-14 Equipotential terminal V
14 S-VIDEO input connector (4P) E-14
AUDIO CHlICH2 input connectors When connecting this unit to any other
15 E-14 component, make absolutely sure that it
(PHONO) is properly grounded by connecting this
16 VIDEO output connector (BNC) E-15 terminal.
17 S-VIDEO output connector (4P) E-15 23
When connecting, use the terminal lug. -
AUDIO CH1/CH2 output connectors
and be sure to used wire with a cross-
18 (PHONO) E-15 sectional area of at least 1.0 mm z.
19 AUDIO MONITOR output connector -
cross-secti~
20 PAUSE REMOTE connector E-18
21 Blank panel or RS-232C/34-pin options E-18
Area:
Terminal Lug
22 Power socket
More than 1.0mm
2
L ____
MODE LOCK switch (ON/OFF) E-15
----'------------ ~---------- ---- --- --
"---
---
- E-6-
- E-?-
OPERATING INSTRUCTIONS